#include <iostream>
using namespace std;

class Solution {
public:
    int Add(int num1, int num2) {
        while(num2 != 0)
        {
            int s = num1 ^ num2;
            int m = (num1 & num2)<<1;
            num1 = s;
            num2 = m;
        }
        return num1;

    }
};

void Test()
{
    long double a, b, c;
    while (cin >> a >> b >> c)
    {
        if ((a + b > c) && (a + c > b) && (c + b > a))
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
    }
}

int main() {
    Test();
    return 0;
}
